onlookerThese are all words for a person who sees sth happen.以上各词均指目睹事情发生的人。
a person who sees sth happen and is able to describe it to other people; a person who gives evidence in a court of law指目击者、见证人、证人：
Police have appealed for witnesses to the accident.
警方呼吁这起事故的目击者出来作证。
a group of people who have gathered to watch or listen to sth such as a play or concert; the number of people who watch or listen to the same thing on television, the radio or in the cinema指戏剧、音乐会、电视、电台、电影等的观众或听众
a person watching television; a person who looks at sth指电视观众、观看者：
The programme attracted millions of viewers.
这个节目吸引了数百万电视观众。
Some of her art is intended to shock the viewer.
她的一些艺术作品旨在教观赏者吃惊。
a person who sees sth happen指观察者、目击者：
According to observers, the plane exploded shortly after take-off.
据目击者说，飞机起飞后不久就爆炸了。
a person who is watching an event, especially a sports event指观看者、观众，尤指体育比赛的：
The stadium holds 75 000 spectators.
该体育场可容纳7.5万名观众。
a person who watches sth that is happening but is not involved in it指旁观者：
A crowd of onlookers gathered at the scene of the crash.
在撞车地点聚集了一大群围观者。
a person who is going past sb/sth by chance, especially when sth unexpected happens路人、过路的人，尤指意想不到的事发生时碰巧路过的：
Police asked passers-by if they had witnessed the accident.
警察询问过路的人是否目击了这次事故。
a person who is near and can see what is happening when sth such as an accident or fight takes place指现场目击者、旁观者：
Three innocent bystanders were killed in the crossfire.
三个无辜的旁观者在交叉火力中丧生。
a person who has seen a crime or accident and can describe it afterwards指犯罪或事故现场的目击者、见证人
-
One onlooker had to be restrained by police .
一个旁观者遭到了警察的制止。
-
Her manner is that of an onlooker .
她采取的是一种旁观者的态度。
-
A crowd of onlookers gathered at the scene of the crash .
在撞车地点聚集了一大群围观者。
-
The onlookers stood aside to let the paramedics through .
围观的人闪开一条路，让医务辅助人员通过。
-
The onlookers stood at a respectful distance .
旁观者站在一定的距离之外，以示尊敬。
-
The small group of onlookers presented a pathetic sight
这一小群旁观者看起来真是让人悲哀。
-
A handful of onlookers stand in the field watching .
少数几个旁观者站在现场观看。
-
Onlookers gathered around the scene of the accident .
旁观者围聚在事故现场。
-
Some onlookers joined the marching demonstrators .
一些旁观的人加入了游行示威的队伍。
-
A hush fell over the onlookers .
旁观者们突然静了下来。
-
Soupios says following the 10 Golden Rules based on ancient wisdom can guide us to the path of the good life where we stop living as onlookers and become engaged and happier human beings .
斯皮奥斯说，遵守这10条基于古老智慧的黃金法则可以指引我们走上通往美好生活的道路。这样的话，我们不再是生活的旁观者，而会成为投入生活，更加幸福的人。
-
From time to time some onlooker will say : ' Not that way ! No , not there ! '
旁观者不时地说着话：“不是那样，不，不，不在那里！”
-
The ring of onlookers distended and closed again elastically .
围观的一圈人散开了，接着又弹簧一般聚拢来
-
Sina Weibo , a Twitter-like platform , has banned netizens from using words such as gossip or onlooker of posts involving entertainment idols .
行动开始以来，腾讯、抖音、豆瓣、新浪微博等多个平台均发布公告，开始清理各类乱象。新浪微博禁止用户在昵称中使用“八组”、“瓜组”等字眼，同时加强对娱乐圈偶像相关帖文的管理。
-
He is always a onlooker when other people need help .
当别人需要帮助的时候，他总是冷眼旁观。
-
In the second one , you 're an onlooker as well .
而第二种情况，你也是一个旁观者。
-
He also asked other female onlookers to help cover up the woman .
此外，他还向在场的女性求助，让她们把受害人的身体挡住。
-
It must be someone famous , an onlooker said .
这肯定是什么知名人士，一名围观者说。
-
Foreign observers commented on Chinese national characters in an onlooker 's capacity ;
外国观察家以旁观者的身份对中国国民性的评说；
-
A funeral would have a lot of onlookers from morning to night .
办丧事那天，从早到晚的，都有很多人来看。
-
He fell into the water , much to the entertainment of the onlookers .
他跌进水中，旁观者大乐。
-
Destroyed in the vicinity just residential areas , many people have come to onlookers .
销毁现场附近正好是居民住宅区，有不少群众纷纷赶来围观。
-
The police tried to move the onlookers along .
警察试图叫旁观的人走开。
-
One that views , especially an onlooker or spectator .
观察者观看者，特指旁观者或者观众。
-
Onlooker : I 'm considering that how much money you should pay for me .
旁观者：我在算你要付我多少钱。
-
An onlooker said : ' They looked totally fine considering all their history . '
一位目击者说道：“他们看上去好像已经完全对他们的过往情史释然了。”
-
They said he wished onlookers a happy new year before he died from his injuries .
目击者表示，在布朗因伤去世前，还祝福周围的人新年快乐。
-
As a onlooker , I don 't care about the progress of the project .
作为旁观者，我不在意工程进度。
-
I am still an onlooker and my position is privileged .
我仍然是个旁观者，我处于享有特殊权利的位置。
-
Never argue with a fool , onlookers may not be able to tell the difference .
别和傻子吵架，因为旁人可能无法区分谁是傻子。
指因爱好或工作而观察某人、某事物的人。
More than ten thousand bird watchers visit annually.
每年有万余名观鸟者到访。
Where is the fire watcher?
火灾警戒员在哪里？
At that moment, the watchers became strangely quiet.
在那个时刻，那些观察家变得出奇地安静。
指戏剧、电影等的观众或演讲、音乐（会）等的听众，为集合名词；作主语时，若强调整体则其谓语动词用单数形式，若强调多个成员则其谓语动词用复数形式。
The audience was enormous.
观众人很多。
The audience were greatly moved by his words.
听了他的话，观众们很感动。
The performance caused a roar of laughter in the audience.
表演引起了观众的哄堂大笑。
His lecture drew a large audience.
他的讲座吸引了一大批听众。
指对某些事件、局势、事物等进行长期或定期观察的人，这些人被视为相关方面的专家。
conomic/political observers
经济观察家/政治观察员
The observer should take full notes on the atmospheric conditions.
观测者应对大气状况作详细记录。
An acute observer usually sees the essence of things at first sight.
敏锐的观察家通常一眼即可看出事物的本质。
指只在一旁静观事件发生或事态发展而不介入其中的人。
Onlookers gathered around the scene of the accident.
旁观者围聚在事故现场。
Her manner is that of an onlooker.
她采取的是一种旁观者的态度。
Some onlookers joined the marching demonstrators.
一些旁观的人加入了游行示威的队伍。
尤指体育赛事的观众，也指某些公共活动（如演出、游行等）的观看者。
About 10,000 spectators were watching the game.
约有1万名观众在观看比赛。
Thousands of spectators came to the city for the horse race.
数以千计的观众来到这座城市观看赛马。
The policeman asked the spectators to stand back.
警察要观看者退后。